Tutomu Karino

Parity Violating Nonleptonic Decays of Charmed Hadrons in the Quark Model

The single quark transition model for parity violating hadron decays in triplet scheme is extended to that in charm scheme and many sum rules among charmed hadron decay amplitudes are obtained. The relation of the model to the current-current interaction is discussed and the .dl relations are also discussed.

On the Generalization of the Urbaryon Model Based on Lepton-Pairs

the shortcomings of the model proposed by Koide and two of the ~uthors (T. H. and S. 0.), and it is shown that the simply extended ones of the original model are most favourable. The case is also examined when the leptonic neutral currents exist. Further discussion is given about KL-7/Lil decay.

A Note on the Urbaryon Models

(1) Afterwards a modification of the model (and called the Hiroshima model6>) has been put forward to save some difficulties encountered in the New Nagoya model in explaining the points: (i) the .dl=l/2 rule in the non-leptonic decay, (ii) the nearly equal magnitudes of the weak coupling constants of the Y ~ N+n and n~,u+v decays, and (iii) the apparent non-conservation of the lepton number, namely the n 0(e) 7. 0 (,u) transition in the non-leptonic decay. In the Hiroshima model the structure of the urbaryons has been given by